Isolating languageAn isolating language is a type of language with a morpheme per word ratio close to one, and with no inflectional morphology whatsoever. In the extreme case, each word contains a single morpheme. Examples of widely spoken isolating languages are Yoruba in West Africa and Vietnamese (especially its colloquial register) in Southeast Asia. A closely related concept is that of an analytic language, which uses unbound morphemes or syntactical constructions to indicate grammatical relationships.
Indo-European ablautIn linguistics, the Indo-European ablaut (ˈæblaʊt, from German Ablaut ˈaplaʊt) is a system of apophony (regular vowel variations) in the Proto-Indo-European language (PIE). An example of ablaut in English is the strong verb sing, sang, sung and its related noun song, a paradigm inherited directly from the Proto-Indo-European stage of the language. Traces of ablaut are found in all modern Indo-European languages, though its prevalence varies greatly.
LoanwordA loanword (also a loan word, loan-word, or borrowing) is a word at least partly assimilated from one language (the donor language) into another language (the recipient language, also called the target language). This is in contrast to cognates, which are words in two or more languages that are similar because they share an etymological origin; and calques, which involve translation. Loanwords from languages with different scripts are usually transliterated (between scripts), but they are not translated.
Construction grammarConstruction grammar (often abbreviated CxG) is a family of theories within the field of cognitive linguistics which posit that constructions, or learned pairings of linguistic patterns with meanings, are the fundamental building blocks of human language. Constructions include words (aardvark, avocado), morphemes (anti-, -ing), fixed expressions and idioms (by and large, jog X's memory), and abstract grammatical rules such as the passive voice (The cat was hit by a car) or the ditransitive (Mary gave Alex the ball).
Generalized quantifierIn formal semantics, a generalized quantifier (GQ) is an expression that denotes a set of sets. This is the standard semantics assigned to quantified noun phrases. For example, the generalized quantifier every boy denotes the set of sets of which every boy is a member: This treatment of quantifiers has been essential in achieving a compositional semantics for sentences containing quantifiers. A version of type theory is often used to make the semantics of different kinds of expressions explicit.
Lexical itemIn lexicography, a lexical item is a single word, a part of a word, or a chain of words (catena) that forms the basic elements of a language's lexicon (≈ vocabulary). Examples are cat, traffic light, take care of, by the way, and it's raining cats and dogs. Lexical items can be generally understood to convey a single meaning, much as a lexeme, but are not limited to single words. Lexical items are like semes in that they are "natural units" translating between languages, or in learning a new language.
Underlying representationIn some models of phonology as well as morphophonology in the field of linguistics, the underlying representation (UR) or underlying form (UF) of a word or morpheme is the abstract form that a word or morpheme is postulated to have before any phonological rules have been applied to it. In contrast, a surface representation is the phonetic representation of the word or sound. The concept of an underlying representation is central to generative grammar.
ReferenceA reference is a relationship between objects in which one object designates, or acts as a means by which to connect to or link to, another object. The first object in this relation is said to refer to the second object. It is called a name for the second object. The next object, the one to which the first object refers, is called the referent of the first object. A name is usually a phrase or expression, or some other symbolic representation. Its referent may be anything – a material object, a person, an event, an activity, or an abstract concept.
Semantic changeSemantic change (also semantic shift, semantic progression, semantic development, or semantic drift) is a form of language change regarding the evolution of word usage—usually to the point that the modern meaning is radically different from the original usage. In diachronic (or historical) linguistics, semantic change is a change in one of the meanings of a word. Every word has a variety of senses and connotations, which can be added, removed, or altered over time, often to the extent that cognates across space and time have very different meanings.
LexicalizationIn linguistics, lexicalization is the process of adding words, set phrases, or word patterns to a language's lexicon. Whether word formation and lexicalization refer to the same process is controversial within the field of linguistics. Most linguists agree that there is a distinction, but there are many ideas of what the distinction is. Lexicalization may be simple, for example borrowing a word from another language, or more involved, as in calque or loan translation, wherein a foreign phrase is translated literally, as in marché aux puces, or in English, flea market.
